/Engine/Source/Runtime/Engine/Classes/Curves/RealCurve.h
Generate a new set of attributes that contains only those attributes common to both A and B
static [FCurveAttributes](API\Runtime\Engine\Curves\FCurveAttributes) MaskCommon ( const [FCurveAttributes](API\Runtime\Engine\Curves\FCurveAttributes) & A, const [FCurveAttributes](API\Runtime\Engine\Curves\FCurveAttributes) & B )